Lifting device



Dec. 29, 1931.

I J'. SYLVESTER LI FTING DEVICE Original Filed Jan. 21. 1929 2Sheets-Sheet 1 nMTRTr Dec. 29, 193 1. J. SYLVESTER 1,838,592

LIFTING DEVICE Original Filed Jan. 21, 1929 2 Sheets-Sheet 2 i UNITEDSTATES Original application fil ed January 21,

Patented Dec. 29, 1931 r rs-N'r orrlcs JULIUS sYLvEsTER," on wAsHINeroN,PENNSYLVANIA, AssI NOR -'1"0' sImPLnx ENGINEERING COMPANY, 0F DELAWAREThis invention relates to improvements in lifting devices for use inremoving sheet glass or other materials from roller lehr conveyors orother roller conveyors, and the "present application is a division of-mypriorapplication filed January 21,1929, Serial No.

The object of the invention is to provide a simple, reliable andefiicient construction of liftingdevice whereby sheets of glass may bereadily and convenientlylifted off the conveyor rollers and shiftedlaterally of the con- "veyor for discharge at one side thereof.

A further object of the invention is to provide a lifting device of thecharacter described whereby large. sheets of glass or other materialsmay be expeditiously handled without injury thereto. The inventionconsists of the features of construction, combination and arrangement ofparts, hereinafter fully describedrand with.

Fig. 4 is a transverse section through the conveyor, showing the glasslifting-device in end elevation and illustrating in dotted lines itslifting action. p 7

Referring now more particularly to the drawings, L designates theheating chamber or tunnel of a sheet glass annealing kiln or lehr, inwhich the glass sheets 16, one of which is shown, are intermittentlysupplied to the lehr at certain intervals, said sheets being supportedand conveyed by rolls 17 from a point in advance of the receiving end Lof the lehr to and through the lehr chamber to the discharge end Lthereof. The rolls 17 are suitably power driven in practice and the lehrchamber suitably heated for the annealing action. At the discharge endof the lehr chamber the glass sheets pass outward upon a section ofidler rolls 21 beyondwhich WYASHYILNGT'ONL rnN s LvA rA, A CO POR TIONOF:

1 LIFTING nnvrcn 1929, Serial No. 333,887. Divided an this applicationfiled January 1 4, 1930. Serial No. 418,578.

are located a, plurality of power operated manually-controlled deliveryrolls 22, said rolls 22 being journaled on an elevated frame F} Thelength of the idler section of rolls '21 with relation to the length ofthe glassg sheet 16 is such that a sheet of glass 16 will entirelybridge this section, so that one end of the sheet may still rest uponthe rolls 17 at the discharge end of the lehr chamber when manuallycontrolled rolls 22; 'The lifting deviceifor removing the glass theother end of the sheet has reached the fm from the rolls 22 comprises-aplurality of pairs of vertically 'reciprocable channel bars87,'extending between certain of the rolls 22,- c5

and of somewhat less length'than the rolls. Between. the pairs of bars8? are carried antifriction transfer rollers 88 which when the bars 87are raised from a normal lowered position to the position shown indotted lines 'j'o in Fig. 4 are adapted to'support the sheet 16 in sucha manner that it may be run sidewise off the conveyor on the rollers 88.

. For raising and lowering the channel bars 87 a plurality of plungers89, movable" in 7'5 cylinders 89, may be employed, these being operatedby bell cranks 90. These bell cranks are connected to a pair ofoperating'rods 91 extending lengthwise of the lehr. Power is furnishedfrom a suitable motor 92, which, so

through reducing gear 93, acts through eccentrics 94, links 95,transverse rock shaft 97 and links 90 to move the rods 91 forward orbackward to thereby raise or lower the glass lifting rollers 88. Themotor is provided 95 with a suitable limit switch 98 which stops themotorwhenev'e'r the eccentrics 94 have moved through an angle'of 180,

I The lifting device above-described is simple, reliable and efficientinconstruction and 90 action and allows large-and weighty sheets ofglass to be removed from rolls 22 with ease and celerity and with aminimum of liability of damage tothe sheet. While the invention has beendisclosed, forrpur'pose of-flfi example, for use in a lehr organizationfor handling glass sheets, it is not limltedthere to, as it is obviousthat in practice it'may be employed in connection with rollerconveyorsgenerally for removing therefrom various 100 materials which have beentransported thereby.

Having thus fully described my invention, I claim 2- 1. In combinationwith a roller conveyor having spaced conveying rolls, a section of idlerolls succeeding the conveyor rolls for receiving articles successivelyfed by the conveyor rolls, a section of power driven delivery rollssucceeding the idle rolls for conveying an article from the idle rolls,ally of said rolls being mounted for rotation in the same direction, anda lifting and discharge device comprising members arranged parallel withand between and normally disposed below the plane of the delivery rollsfor lifting an article vertically from the delivery rolls to a levelabove the same, said members having transfe' rolls rotating at rightangles to the delivery rolls for supporting the article and on which thearticle may be withdrawn transversely of said roller conveyor.

2. In combination with a lehr for anneal ing glass sheets, said lehrembodying a roller conveyor having spaced conveying rolls, a section ofidle rolls succeeding said conveyor 'rolls for receiving glass sheetssuccessively fed by the conveyor rolls, a section of power drivendelivery rolls succeeding the idle rolls for conveying a glass sheetfrom the idle rolls, the length of the section of idle rolls withrelation to the glass sheet being such that the sheet may bridge overthe same be tween the conveyor rolls and delivery rolls, and a liftingand discharge device comprising members arranged parallel with andbetween and normally disposed below the plane of the delivery rolls forlifting an article vertically from the delivery rolls, said devicehaving transfer rolls rotating at right angles to the delivery rolls forsupporting the glass sheet and on which the sheet may be withdrawntransversely ofthe conveyor, and power means for conjointly raising orlowering said members.

3. In combination with a roller conveyor having spaced parallelconveying rolls, a lifting and discharge device comprising bars parallelwith and movable vertically between certain of the conveyor rolls, eachbar being formed of spaced angle metal members, sup porting rollers oneach bar journaled between the angle metal members thereof so as to berotatable in a direction transversely of said conveyor rolls, andmechanism for jointly raising and lowering said bars.

I. In combination with a roller conveyor having spaced parallelconveying rolls, a lifting and discharge device comprising spaced barsarranged parallel with each other and with the conveyor rolls andmovable verticalbetween certain of the conveyor rolls, supportingrollers on said bars rotatable in a direction transversely thereof andof said conveyor rolls, sets of plungers for raising and lowering saidbars, bell cranks coupled to the plungers, reciprocatory rods connectingthe bell cranks of the sets of plungers, a rock shaft coupled to therods, and motor driven means for operating the rock shaft.

5. In combination with a roller conveyor having spaced conveying rolls,a lifting and discharge device comprising bars arranged parallel withand movable vertically between certain of the conveyor rolls, supportingrollers on said bars rotatable in a direction transversely thereof, setsof plungers for raising and lowering the bars, bell cranks coupled tothe plungers, reciprocatory rods connecting the bell cranks of therespective sets of plungers, a transverse rock shaft, links connectingsaid shaft to the rods, a reducing gear, eccentrics operated thereby foractuating the rock shaft, and a motor for driving said reducing gear.

6. In combination with a roller lehr for annealing glass sheets, adischarge mechanism therefor comprising a section of idler rollerssucceeding the lehr rolls for receiving glass sheets from said lehrrolls, a sect-ion of power operated delivery rolls succeeding the idlerrolls for conveying a glass sheet from the idler rolls, the length ofthe section of idler rolls with relation to the glass sheet be- 1ng suchthat the sheet may bridge over the same between the lehr rolls anddelivery rolls, and means for lifting the sheet vertically, said liftingmeans having transfer rolls rotatable at right angles to the lastnamedrolls and movable from a normal horizontal position below and upwardlybetween and to a posit-ion above the horizontal plane of the saidlast-named rolls for raising a sheet therefrom and permitting the sheetto be slid laterally thereof.

In testimony whereof I affix my signature.

JULIUS SYLVESTER.

